Low-cost books in paper covers make ______ some of the world’s best literature to readers.
A. ordinary B. available C. comfortable D. necessary
He must be helping the old man to water the flowers, ______?
A. is he B. isn’t he C. must he D. mustn’t he
—Can I pay the bill by check?
—Sorry, Madam, but it is our managing rule that payment ______ be made in cash.
A. shall B. may C. will D. can
The magazine you lent me ______ among the 10 most popular ones in our school.
A. named B. belonged C. listed D. ranked
Professor Smith, along with his assistants, ______ on the project day and night to meet the deadline.
A. work B. working C. is working D. are working
Class regulations require ______ is the last to leave the classroom ______ off all the lights.
A. who; should turn B. whomever; turn
C. whoever; turning D. whoever; turn
